Gear spinning pump



ct. 26, 1937. 'I '.'VOLI;ENBROICH- 2,096,370

GEAR SPINNING PUMP Filed June 28, 1935 Journal the. same example with aPatented Oct. 26, 1937 acaactc GEAR srrNNiNG PUMP Theodor Vollenbroich,Remscheid-LenirepIGermany, assignor Aktiengesellschaft, GermanyApplication June 28, 1935,

to Banner Maschinenfabrik, Wuppertal Oberbarmen,

Serial No. 28,895

in Germany April 9, B1934 1 o -(oi. 103-.-126)- This invention relatesto a gear pump for delivering spinning solution to artificial silkspinning machines. It is known in such pumps to provide the drivingshaft with a collar and to in a bore in the clamping element. Thiscollar is, however, provided on the inner side of the clamping .elementbetween the same and the front plate of the pump in order to thusprevent the spinningv solution from enter- 1o ing the bearing ofv thedriving shaft and a hardening of this solution by inflowing air.Experience has shown that in the arrangement referred to spinningsolution still penetrates into the bearing. Moreover a separatelubrication is necessary for the driving shaft, which adds to the costof the-pump. The pump must be dismantled for the removing ofthe drivingshaft because the collar of the shaft is arranged within the'pump. It isalso known to utilize the spin 2o ning solution for lubricating thedriving shaft and. to close the hearing at its outer side by means of astufling box.

The present invention consists'in arranging the recess designed toaccommodate the collar. 25 of the driving shaft on the outer side of theclamping element and to cover this recess for cap nut without stuflingbox; to hold the collar.

By this arrangement thebearing of the drivbut a stufling boxis omittedand nevertheless any air admission is excluded. The driving shaft can beremoved after unscrewing the cap nut without dismantling or the pump,which rep-' 35 resents a considerable simplification.

' An embodiment of the invention is illustrated by way ofexample in theonly figure of the accompanying drawing which shows a pump part,- ly inside elevation and partly in section.

' The pump, comprising a clamping element I and pump plates 2, I, 4 andi, carries in its ining shaft is lubricated by the spinning solution, j,

-.sion and preventing ingress of air The collar l0 prevents air fromcoming into' contact with the spinning solution.

I claim:--

A gear spinning pump, comprising in combination, a clamping elementhaving a lateral extension with a bearing bore in the clamping elementextending from a point adjacent the inner end of the clamping elementthrough the lateral extension, said bore being of constant diameterthroughout its length, the outer end of the clamping element extensionhaving an annular recess therein surrounding the bearing bore, pumpplates on the inner side of said clamping element, an intermeshingdriving gear and driven gear arranged between said plates, a shortshaft-mounted in said plates and carrying said driving gear, a drivingshaft dimensioned for journalled mounting in thebearing bore of said theextension, a collar rigid with the driving shaft and fitting in saidannular recess and a cap nut surrounding the outer projecting end of theshaftand screwed onto said lateral extension to maintain said collar insaid recss whereby thespinning solution may flow through the bearingbore for lubricating the driving shaft and said collar acting to preventthe escape of spinning fluid at theouter end of the lateral extenat theouter end of the lateral extension.

rhnonoa vounmaaorcn,

